Good on you, Liz, and congratulations to your husband.
I'm sure you already know it's a big committment, and a supportive spouse as it seems you are will be a massive help to him throughout the course.
I wasn't married when I went through (a long time ago) but I remember how all-consuming it gets, so hang in there both of you and good luck.
There are numerous things in military life that can stuff you round and get you down, but for someone who's intent on pursuing the job, it can also be very rewarding.